The morris peters co



(No Model.)

J. 0. & s. LAKE. OYSTER DREDGB WINDLASS.

No. 485,635. r Patented Nov. 8, 189 2.

THE "cams Firms 00 FHOTOLITHO WASHINGTON n c tram" Tamas JOHNCHRISTOPHER LAKE AND SIMON LAKE, OF BALTIMORE, MARYLAND, ASSIGNORS TOTHE J. C. LAKE & SON COMPANY OF BALTIMORE CITY,

OF SAME PLACE.

OYSTER-DREDGE WINDLASS.

SPECIFICATION forming part of Letters Patent No. 485,635, dated November8, 1892.

Application filed April 13, 1892. Serial No. 429,072. (No model.) I

To all whom it may concern.-

Be it known that we, J OHN CHRISTOPHER LAKE and SIMON LAKE, citizens ofthe United States, residing in the city of Baltimore and 5 State ofMaryland, have invented a new and useful W'indlass, of which thefollowing is a specification.

Our invention relates to improvements in oyster dredge windlasses orhoisting ma- I chines, the object of which is to have automatic andpositive control of the weights with only a limited movement of thehandle and to prevent injury to the men in case of meeting with anobstruction, which is a common I occurrence in oyster-dredging; also, toprevent the continualnoise and wear of the pawl against theratchet-teeth, common in'siinilar machines as heretofore constructed. Weobtain these objects bythemechanismillustrated in the accompanyingdrawings, in which- Figure 1 is aside elevation of ourimproved Windlass.Fig. 2 is an end view of same, showing part of frame broken away. Fig. 3is an end elevation from the spool with spool 2 5 cut away and flange insection, showing the operation of locking-levers and means for operatingsame. Fig. 4 is a view of the pawllifting device. Fig. 5 is an elevationof ratchet-wheel or carrier. Fig. 6 is aview of the 0 handle-holder.

Similar letters refer to similar parts throughout the several views.

Reference being had to the drawings, A A are frame pieces or supports.

5 B is the winding drum provided with flange F.

E is a ratchet-wheel, having a limited movement on the shaft, controlledby cam K and lever L and provided with pins P P, on which 40 are pivotedthe locking-levers L L.

N N are wearing-shoes pivoted to the levers L L at C C.

K K are lifting-cams secured .to the shaft 01 and adapted to come incontact with and lift the levers L L.

G is a friction-clamp or pawl-lifting device, preferably made to fitinto recess on hub of ratchet-wheel E.

O is a bolt for increasing the tension of same, if desired.

J is a pawl adapted to come in contact with and prevent reverse movementof ratchetwheel E and shaft D.

R is a pin for limiting the backward movement of pawl J.

I is a handle-holder adapted to fit on the end of shaft D and having aradial slot extending through its center, through which the crank-handleH is adapted to slide, and provided with set-screws or keys for holdingsame 6c in position. y

The operation of the machine is as follows: In winding, the cams 'K Kcome in contact with and lift the ends of levers L L and force themoutward against the inner surface of the flange F, locking the drum andshaft together. If it is desired to lower the weight or (as is usual indredging for oysters) an obstruction is met with, the handle and shaftare revolved backward sufficient for the pawl to engage with a tooth onthe ratchet-wheel, and the shaft continues to revolve backward until thecams relieve the strain on levers L L, when the drum is released. Itwill be seen that the operator has perfect control over the looking andunlocking of the drum, a very small movement of the handle eitherforward or backward being sufficient to lock or unlock it; also, whenthe line is running off the speed can be regulated at the will of theoperator by simply increasing or diminishing the pressure on the handleH. When the handle is turned forward in winding, the pawl is lifted fromcontact with theteeth of ratchet-wheel or carrier through the medium ofthe friction-c1amp G, which also serves the purpose of holding back thecarrier when handle is first started forward,.thereby causing thelocking mechanism to take quicker effect. When the handle is reversed,it again instantly engages with the teeth of ratchetwheel.

We do not limit ourselves to the exact construction of this device, aswe have also used a friction-plate with the same eff'ect. I 5

What we claim as our invention, and desire to secure by Letters Patent,is

1. In an oyster-dredge Windlass or winch,a spool or drum loosely mountedonacam-fitted shaft, in combination with an intermediate IOOcarrier-wheel provided with locking-levers, and pawl J, adapted toengage with teeth of carrier-wheel, so arranged that the spool and shaftwill be automatically locked together by frictional contact on a forwardmovement of the shaft and automatically released on a backward movementof said shaft, substam tially as described.

2. A flanged winding-drum loosely mounted on a shaft, a toothed Wheel,levers provided with wearing-shoes pivoted thereto, and cams foroperating same, in combination with a pawl and a friction device forholding same from contact with teeth of wheel on the forward movement ofshaft, substantially as shown and described.

3. In an oyster-dredge Windlass, the combination, with a shaft, a drumloosely mounted thereon, a ratchetivheel also loosely mounted on theshaft, and means for limiting the independent rotation thereof, of apawl and a friction device bearing against a revoluble part of themachine, whereby the pawl is antomatically lifted out of contact withthe ratchet-wheel when the shaft is turned forward and allowed to comein contacton a backward movement of same.

4. In an oyster-dredge Windlass, the combination, with a shaft and aflanged drum loosely mounted thereon, of a ratchet-wheel,

a pawl to engage therewith, pivoted lockinglevers provided withwearingshoes adapted to engage the inner surface of the flange, and camssecured to the shaft for operating said levers, and thereby causing theratchet-wheel and drum to revolve with the shaft when the same is turnedforward, snbstantiallyas shown and described. I

5. In an oyster-dredge Windlass, the combination of a flanged spool ordru1n,acam-fitted shaft, a ratchet-wheel or carrier-levers pivotedthereto and provided with wearing-shoes, and a frictional device forholding a pawl from contact with teeth of carrier and restrainingforward movement of carrier, thereby causing locking-levers to act morepositively, together with a handle-holder secured to ends of shaft,provided with a radial slot to allow adjustment of handle, substantiallyas shown and described.

In testimony that we clai ur the foregoing We have hereto set our handsthis 12th day of April, 1892.

J. CHRISTOPHER LAKE. SIMON LAKE. \Vitnesses:

FELIX R. SULLIVAN, A. M. LUKE.

